Seat and back rest for a chair



FIG. 1 is a perspective view showing the top, left side and front of aseat and backrest for a chair, the broken lines of other parts of thechair being for illustrative purposes only and forming no part of theclaimed design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a top plan view thereof.

The ornamental design for a seat and back rest for a chair, as shown anddescribed.